One former employer tested prospective hires by handing them a print-out of a script, nothing too fancy, just some shell script, and ask them to explain what th

One former employer tested prospective hires by handing them a print-out of a script, nothing too fancy, just some shell script, and ask them to explain what the script did and if there were any errors. If one can read the language, and know what it does, the errors are pretty obvious. If the prospect doesn't know it, they're not able to talk to it, and the bullshit meter goes off pretty quick if they try faking it.